Home / 1,872.40-2,803.06-1,387.62

Finding the Fourth Proportional to 1,872.40, 2,803.06 and 1,387.62

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Solution

The fourth proportional to 1,872.40, 2,803.06 and 1,387.62 is: 2,077.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,872.40 : 2,803.06 = 1,387.62 : x
  2. Step 2: Convert to fraction form
    1,872.40/2,803.06 = 1,387.62/x
  3. Step 3: Cross multiply
    1,872.40x = 2,803.06 × 1,387.62
  4. Step 4: Simplify right side
    1,872.40x = 3,889,582.12
  5. Step 5: Solve for x
    x = 3,889,582.12/1,872.40
  6. Step 6: Final answer
    x = 2,077.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.